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Re: Unique array of arrays - how can I do this? [message #181313 is a reply to message #181308]

Sat, 04 May 2013 12:25

Denis McMahon
Messages: 634
Registered: September 2010

Karma:

Senior Member

On Sat, 04 May 2013 04:51:28 -0700, thomas.lehmann.private wrote:

> Hi,
>
> While calculation I get a solution as an array of integers. There're
> many solutions and I would like to keep them in an array.
>
> Because of the algorithm there are different paths to get to the same
> solution but I want to have it once only.
>
> I know that I can use array_unique but that's too slow when called too
> often. I can't wait until end of calculation because then I run into
> memory problems.
>
> So I need an efficient way to add elements once only to an array while
> calculation with an array as element.
>
> How can I do this?

Given that your answers are integers, at the point that you put your
answers into the array, assuming that the answer is in $ans:

if ( !isset( $arr ) )
$arr = array();
$arr[$ans] = $ans;

When you finish calculations:

sort( $arr );
foreach ( $arr as $k=>$v )
echo "Answer {$k} is {$v}.\n";

or:

sort( $arr );
echo "The answers are: " . implode( $arr, ", " ) . ".\n";

--
Denis McMahon, denismfmcmahon(at)gmail(dot)com

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[Message index]

		Unique array of arrays - how can I do this? By: thomas.lehmann.privat on Sat, 04 May 2013 11:51
		Re: Unique array of arrays - how can I do this? By: The Natural Philosoph on Sat, 04 May 2013 12:20
		Re: Unique array of arrays - how can I do this? By: Denis McMahon on Sat, 04 May 2013 12:25
		Re: Unique array of arrays - how can I do this? By: Thomas 'PointedEars' on Sun, 05 May 2013 22:06

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